Interference Effects on Kondo-Assisted Transport through Double Quantum Dots

Details Interference Effects on Kondo-Assisted Transport through Double Quantum Dots Interference Effects on Kondo-Assisted Transport through Double Quantum Dots

2005-03-14

arxiv.org/abs/cond-mat/0503341v2

Phys. Rev. B 72, 085304 (2005)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

9 pages, 11 figures ; minor corrections and references added

Scientific paper

10.1103/PhysRevB.72.085304

We systematically investigate electron transport through double quantum dots with particular emphasis on interference induced via multiple paths of electron propagation. By means of the slave-boson mean-field approximation, we calculate the conductance, the local density of states, the transmission probability in the Kondo regime at zero temperature. It is clarified how the Kondo-assisted transport changes its properties when the system is continuously changed among the serial, parallel and T-shaped double dots. The obtained results for the conductance are explained in terms of the Kondo resonances influenced by interference effects. We also discuss the impacts due to the spin-polarization of ferromagnetic leads.

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